Hello there, Ekatarin.
I appreciate you for sharing your experience with the connection between your payments and invoice while using Melio app.
I understand that you've already tried contacting Melio Support about this. However, the nature of your concern requires help from the Melio itself. Since it's a third-party application and is not affiliated with QBO, you'll want to reach them so they can verify the settings.
Feel free to click this link to learn more about the process of integrating Melio with QBO: Integrate Connect Melio with QuickBooks Online.
Let me share these easy-to-access articles, webinars, and video tutorials that will help you in familiarizing the different tasks, features, and functions of QBO. Below are the following:
Be sure to get back to me if you have other concerns. I'd be here to assist you further. Wishing you well.
